Bug 1712749 (CVE-2019-9821)

Summary: CVE-2019-9821 firefox: use-after-free in AssertWorkerThread leading to crash
Product: [Other] Security Response Reporter: Marian Rehak <mrehak>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: 0xalen+redhat, anto.trande, gecko-bugs-nobody, jhorak, john.j5live, kengert, pjasicek, rhughes, rstrode, sandmann, stransky
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: firefox 67 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2019-05-24 05:33:06 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1712750    
Bug Blocks: 1712751    

Description Marian Rehak 2019-05-22 08:00:31 UTC 
A use-after-free vulnerability can occur in AssertWorkerThread due to a race condition with shared workers. This results in a potentially exploitable crash.
Comment 1 Marian Rehak 2019-05-22 08:00:42 UTC 
Created firefox tracking bugs for this issue:

Affects: fedora-all [bug 1712750]
Comment 2 Marian Rehak 2019-05-22 08:22:02 UTC 
External References:

https://www.mozilla.org/en-US/security/advisories/mfsa2019-13/#CVE-2019-9821
Comment 3 Huzaifa S. Sidhpurwala 2019-05-24 05:33:06 UTC 
Does not seem to affect the version of firefox shipped in Red Hat Enterprise Linux 6, 7 and 8 i.e. firefox 60.7 ESR.